Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10633496 | Optical Materials | 2005 | 4 Pages |
Abstract
We studied the effect of target annealing temperature on optical and structural properties and composition of CdS thin films prepared by pulsed Nd:YAG laser. Deposited samples from annealed targets at 300 °C showed a mixed cubic and hexagonal structure, a band gap of about 2.56 eV and Cd/S ratio equal 1. This ratio increased to 2.40 and its band gap decreased to 2.46 eV when the sample was annealed at 500 °C for 1 h in air. However, films prepared from annealed targets at 500 °C became dark due to existence of polymorphous phase of CdO. Films changed to transparent yellow color with a hexagonal CdS structure and some peaks related to CdO after annealing above 250 °C in air. Its band gap value increased from 2.36 eV to 2.41 eV after annealing at 250 and 500 °C respectively.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
S.M. Mahdavi, A. Iraji zad, R.M. Tilaki,